Cast car-truck side frame



1,621 786 March 1927' G. T. JOHNSON ET AL CAST CAR TRUCK SIDE FRAME Filed March 25; 1926 firm me 1 5 Patented Mar. 22, 1927.

UNITED STATES PATENT OFFICE.

GEORGE T. JOHNSON AND HARRY W; STERTZBACH, OF COLUMBUS, OHIO, ASSIGNORS TO THE BUCKEYE STEEL CASTINGS COMPANY, OF COLUMBUS, OHIO.

onsr can-manor: SIDE FRAME.

Application filed March 25, 1926. Serial No. 97,342.

This invention relates to car trucks and especially to cast side frames of the type shown in Letters-Patent, No. 1,523,793, granted January 20, 1925, to H. V. Stertzbach and M. R. Hansen, in which the entire side frame, including the journal boxes, is a single casting, the object of the present invention being to provide a construction which will resist the tendency to buckle in the region of the journal box due to the compression and shearing stresses. The invention is illustrated in the accompanying drawing and will be hereinafter fully set forth and particularly defined.

In the drawing, Figure 1 is a side elevation of a portion of a side frame embodying the invention;

Figure 2 is a top plan View of the same;

Figure 3 is a section on the line 3-3 of Figure 2.

The side frame comprises a column 1, a journal box 2, a compression member 3 extending from the top of the frame over the column to the journal box, and a tension member 4 extending from the bottom of the column to the top of the journal box. The tension member is in the form of an inverted channel the top, plate of the same lying in an inclined plane extending from the. bottom of the column toward the upper inner corner of the journal box. The com: pression member is only in the form of an inverted channel between the columns and the plate 5 of this compression member is arranged obliquely relative to the side Walls of the side compression member and extends downwardly from the top of the frame at a point over the column toward the inner corner of the journal box, terminating near the journal box in an arcuate web 6 which merges into the top plate 7 of the tension member. The web 6 and the plate 5 unite the side walls and avoid a direct connection with the journal box, while the open space 8 between the journal box and the web advantageously accommodates shrinkage in the process of manufacture. The side Walls of the compression member extend to the outer side of the journal box and a bridge 9 unites them over the journal box.

It will be noted that the side walls are united in the region of the journal box so as to efiiciently resist the tendency to buckle which ordinarily results from the compres sion and shearing stresses. The walls are connected by metal which is an essential element of the structure and not a mere accessory having merely the function of a tie.

Having fully described our invention what we claim as new and desire to secure by Letters-Patent, is

A east side frame for car trucks comprising a column, a journal box, and compression and tension members extending from the column to the top of the journal box, the tension member having the form of an inverted channel with its side walls united with the journal box, the compression member including a top plate which is disposed obliquely relative to the side walls thereof and unites said walls and merges through an arcuate web in the region of the journal box into the top plate of the tension member.

In testimony whereof, we have signed this specification.

GEORGE T. JOHNSON. HARRY W. STERTZBAOI-I. 

